Is pre-out the same ?

That is correct! No other requirements needed!

Don't use cheapo patch cords to judge the tube amp!

You can use your pre out as the preamp, but I’d expect it to have an impact on the resulting sound, so you likely won’t get the full effect of the amp. Still worth a try. A pure tube chain is the best way to experience tubes IMO, but it’s also obviously more involved. Many who mix SS/tube go the route of a tube preamp and SS amp.

Check the specks in the owners manual for output impedance of pre-outs. In general, since your intg. is solid state, solid state outs are low impedance- you should be good to go.
 " I believe that it is a 1 to 10 ratio of impedance from
preamp to amp ." - general rule for tubed pre to solid state amp matching.

 There are some here, that have had good results from a solid state preamp matched with a tube amp. A good consideration would be a tubed-hybrid amplifier matched with a solid state preamp. I have this combo.

Phooey,

Get a good RCA and give it a shot. I use a SS Mac with pre out all the time.. If it sounds good it sounds good.. :-)
No bad matches so far, just some better than others..

Regards

Thanks Folks ;
   I do have an ' all tube system ' so...ya !
But this is an all-in-one box for streaming and I really
like the simplicity of this thing . It all works together and is quite easy
to operate . It is my most used system but not the one for critical listening . 

PMM - owners manual ? we don't get no owners manual !
            That spec is not listed and I have 2 emails out to the                             manufacturer . They seem to be quite busy ! ? 

You all be safe now

Just plug it in and away you go......

It will be safe.

The 10:1 ratio has more to do with the frequency response.  The higher the ratio the better, but even a 5:1 won't sound terrible or break anything.

Since you haven’t mentioned the make and model integrated you have all we can go on are general rules of thumb, like the 10:1 ratio. If there is a mismatch the specific result is a roll off of bass response, but even integrated amps’ pre-outs if they are really preamp outputs are likely to be low enough impedance to avoid that. The final point is the big one, we always say the preamp is like the first lens in an optical system, very important in setting the stage for what follows. How good a preamp is in there?  If it’s a Naim Atom, then you should be in great shape, others…your ear will tell. 

Eric - thanks .

crustycoot - excellent 'guess'. Maybe not so crusty ?

Happy SAFE Tunes .